Huge Error - Variant is Being Shown as the Control

After much troubleshooting, we attempted to understand why the control was receiving 30% higher CTR on a button we modified. Now, after looking at the cookies, it looks like the variant is being shown for the control (the index number at the end of the cookie is 0 which represents the control).

Why is this happening? Some additional note is that we adjusted the weight of the variants after the experiment started running, but the data already had a gap from the start.

Huge Error - Variant is Being Shown as the Control

Looking in incognito window, the cookie is completely not matching what variant is being shown. For example, XXXXX!Sxgy-IFuSsG4GEPeGHdqiw.17397.1 sometimes shows the control even though its index is 1 while XXXXX!Sxgy-IFuSsG4GEPeGHdqiw.17397.0 is showing a variant.